效果图：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace Example46
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void label2_Click(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
if (textBox2.Text.Length == 4)
{
textBox3.Text = new Encrypt().ToEncryt(textBox2.Text, textBox1.Text);
}
else
{
MessageBox.Show("密钥长度不对", "提示");
}
}
private void button2_Click(object sender, EventArgs e)
{
if (textBox5.Text.Length == 4)
{
textBox6.Text = new Encrypt().ToDecryt(textBox5.Text, textBox4.Text);
}
else
{
MessageBox.Show("密钥长度不对", "提示");
}
}
}
}
类文件 ：
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
namespace Example46
{
public class Encrypt
{
internal string ToEncryt(string encryptKey, string encryptStr)
{
try
{
byte[] P_str_key = Encoding.Unicode.GetBytes(encryptKey); //获得密钥字节序列
byte[] P_str_str = Encoding.Unicode.GetBytes(encryptStr); //获取需要加密的字符串字节序列
MemoryStream P_stream_MS = new MemoryStream(); //创建内存流
CryptoStream P_stream_CS = new CryptoStream( //创建加密流对象
P_stream_MS, new DESCryptoServiceProvider().CreateEncryptor(P_str_key, P_str_key),
CryptoStreamMode.Write);
P_stream_CS.Write(P_str_str, 0, P_str_str.Length); //向加密流中写入字节序列
P_stream_CS.FlushFinalBlock(); //将数据压入基础流
byte[] P_str_temp = P_stream_MS.ToArray(); //从内存流中获取数据
P_stream_CS.Close(); //关闭流
P_stream_MS.Close(); //关闭流
return Convert.ToBase64String(P_str_temp);
}
catch (CryptographicException ce)
{
throw new Exception(ce.Message);
}
}
internal string ToDecryt(string encryptKey, string encryptStr)
{
try
{
byte[] P_str_key = Encoding.Unicode.GetBytes(encryptKey); //将密钥转换为字符串
byte[] P_str_str = Convert.FromBase64String(encryptStr); //将加密后的字符串转换为字节序列
MemoryStream P_stream_MS = new MemoryStream(P_str_str); //创建内存流对象并写入数据
CryptoStream P_stream_CS = new CryptoStream(P_stream_MS, new DESCryptoServiceProvider().
CreateDecryptor(P_str_key, P_str_key), CryptoStreamMode.Read); //创建加密流对象
byte[] P_string_TP = new byte[200]; //创建字节流对象
MemoryStream P_stream_TP = new MemoryStream(); //
int iCount = 0; // 创建计数器
while ((iCount = P_stream_CS.Read(P_string_TP, 0, P_string_TP.Length))>0)
{
P_stream_TP.Write(P_string_TP, 0, iCount); //将解密后的数据放入 内存流
}
return Encoding.Unicode.GetString(P_stream_TP.ToArray()); //返回 内存流 中的字符串
}
catch (CryptographicException ce)
{
throw new Exception(ce.Message);
}
}
}
}
